As I have previously discussed, the IRS issued a notice in March that announced that for tax purposes bitcoins and other virtual currency will be treated as property. This notice created more certainty for using bitcoins for financial planning purposes, but many details are still unclear. Since bitcoin value can increase greatly and rapidly, some grantors wish to fund grantor retained annuity trusts (GRATs) with bitcoins. However, this same value fluctuation that can result in spikes in value, also makes funding trusts with bitcoins risky. Bitcoins are also an attractive funding source because administration of bitcoin GRATs are relatively low maintenance since transfers are simple and inexpensive.